Cast
Ji Sung as Jang Jae-kyung, a detective of the Narcotics Team at Anhyeon Police Station
Jeon Mi-do as Oh Yun-jin, a social affairs reporter of the Anhyeon Economic Daily
Kwon Yul as Park Tae-jin, a prosecutor at Ahn Hyun District Office
Kim Kyung-nam as Won Jong-soo, Geumhyeong Group's successor
Yoon Na-moo as Park Jun-seo, the central figure in the incident
Jung Yoo-min as Choi Ji-yeon, Jun-seo's wife
Jung Jae-kwang as Kim Chang-soo, Jae-kyung's teammate
Cha Yup as Oh Chi-hyun, Jong-soo's chief secretary
Jeong Soon-won as Heo Joo-song, CEO of Two Star Holdings, an insurance company
Park Geun-rok as Jung Sang-ui, a researcher at Geumhyeong Pharmaceutical
Connection: Episode 9 Recap
Jae-kyung searches Jeong Yun-ho's house and discovers that Yun-ho, a taxi driver and a member of Inner Circle, is the one who burned the body of Lee Myung-guk, a deceased researcher from Geumhyeong Pharmaceutical. The police begin pursuing Yun-ho to arrest him.
Jong-soo and Tae-jin are shocked when they learn that Yun-ho is being chased by the police. Chi-hyun confesses to Jong-soo and Tae-jin that he and Yun-ho murdered Lee Myung-guk, stored the body in the Yeongryun Cold Storage warehouse, then moved it to Myung-guk's house and set it on fire while Jae-kyung and Yun-jin were examining his body at his house.
Realizing all this, Jae-kyung deduces that Yun-ho killed the mill owner to delete the CCTV footage from the route to Yeongryun Cold Storage.
The Inner Circle members had all gathered at the construction site because Jun-seo knew about Myung-guk's body and was blackmailing Chi-hyun. Jun-seo was already aware of Tae-jin's affair with his wife, and this was the reason why Tae-jin had meekly followed him to the construction site after just one phone call from Jun-seo.
Jae-kyung revisits the initial point and tries to understand the intention behind making him addicted to drugs. He suspects it was to use him to expose Jong-soo's corruption.
Yun-ho, now a fugitive accused of murdering the mill owner, secretly meets with Tae-jin, a prosecutor friend who can help him. Yun-ho threatens to expose Tae-jin's long affair with Jun-seo’s wife, Ji-yeon, unless he helps him.
Jong-soo's father, the chairman of Geumhyeong Group, summons Tae-jin and sternly advises him to stay as a prosecutor and not overreach in business matters. He warns Tae-jin not to act like part of the family, humiliating and angering Tae-jin.
Ji-yeon, Jun-seo's wife, visits Jae-kyung’s house where he works with Yun-jin and Joo-song to solve the case. Meanwhile, Yun-jin’s junior reporter, following Ji-yeon, sees Yun-ho suspiciously near Jae-kyung's house and starts to shadow him.
Ji-yeon tells Jae-kyung that while sorting through Jun-seo's documents, she discovered an old man in Boryeong, Chungnam might be connected to the case.
When Joo-song brings out a cake for Yun-jin, Ji-yeon is shocked to realize it’s Yun-jin’s birthday. She rushes to the bathroom to vomit, as Jun-seo had used Yun-jin’s birthday as his password eight years ago. Suspecting something, Yun-jin unlocks Ji-yeon’s phone using her birthday while Ji-yeon is in the bathroom.
Ji-yeon, feeling distressed, leaves hurriedly. Jae-kyung then learns from a photo sent by Yun-jin's junior reporter that Yun-ho is near his house, concluding Episode 9 of "Connection."
